🌱 Introduction
The cell wall, cell membrane, and endomembrane system are key components of eukaryotic and prokaryotic cells. In NEET Biology, multiple-choice questions (MCQs) from these topics are commonly asked in the Cell: The Unit of Life chapter. Practice these handpicked MCQs to sharpen your NEET preparation.
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📘 MCQs on Cell Wall
1. What is the primary component of the plant cell wall?
A. Cellulose
B. Chitin
C. Peptidoglycan
D. Lipids
✅ Answer: A. Cellulose
2. Which of the following organisms lacks a cell wall?
A. Bacteria
B. Plants
C. Mycoplasma
D. Algae
✅ Answer: C. Mycoplasma
3. Middle lamella in plant cells is mainly composed of:
A. Cellulose
B. Hemicellulose
C. Pectin
D. Chitin
✅ Answer: C. Pectin
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🧫 MCQs on Cell Membrane
4. The plasma membrane is composed of:
A. Phospholipids and proteins
B. Cellulose and proteins
C. Chitin and lipids
D. Only proteins
✅ Answer: A. Phospholipids and proteins
5. Fluid mosaic model was proposed by:
A. Schleiden and Schwann
B. Singer and Nicolson
C. Watson and Crick
D. Robertson
✅ Answer: B. Singer and Nicolson
6. The transport of molecules against the concentration gradient requires:
A. Passive transport
B. Osmosis
C. Diffusion
D. Active transport
✅ Answer: D. Active transport
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🧬 MCQs on Endomembrane System
7. Which organelle is not a part of the endomembrane system?
A. Endoplasmic Reticulum
B. Golgi Apparatus
C. Mitochondria
D. Lysosomes
✅ Answer: C. Mitochondria
8. The main function of the Golgi apparatus is:
A. Protein synthesis
B. ATP production
C. Packaging and secretion
D. DNA replication
✅ Answer: C. Packaging and secretion
9. Lysosomes are rich in:
A. Nucleic acids
B. Enzymes
C. Lipids
D. Carbohydrates
✅ Answer: B. Enzymes
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📌 Summary Table
Topic Key Concept Common NEET Focus
Cell Wall Rigid outer covering (plants) Composition, function
Cell Membrane Semi-permeable lipid bilayer Fluid mosaic model
Endomembrane System ER, Golgi, Lysosomes, Vesicles Roles and exceptions
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